Heater connecter plug



Aug. 3 1926. 1,595,003

J. B. DOWNING HEATER CONNECTER PLUG Filed May 17, 1926 Patented Au 3,1926,

1,595,003 UNITED STATES PATENT OFFICE.

JOHN B. DOWN'ING ORANGE, NEW JERSEY, ASSIGNOR TO BEAVER mama d. TOOL CO. INC., OF NEWARK, NEW JERSEY, A CORPORATION OF NEW JERSEY.

HEATER CONNECTER PLUG.

/ Application filed May 17, 1926.- Serial No. roams, i

contacts, which are designed to grip or make a good electrical contact with the appliance terminal posts by slipping over the latter and making contact on both 'sidesof the same.

While heater plugs of the foregoing conventional type have been made in large quantities and have been found to function perfectly in practice, I have found that equally good results can be obtained by my present novel invention wherein the construction is simplified and the expense of production greatly reduced by the employment of metallic terminals comprising single bladed elements of a novel contour so designed in conjunction with the enclosing casing that they will make satisfactory electrical contact with either a flat or round applianc terminal post, the contact being made on only one side of said fiat or rounded terminal appliance post, and the casing sections being so designed as to coact in clamping the single bladed terminals so as to maintain the proper contact between the detachable element and my 'novel enclosed single blade terminals. v

To the above ends my invention consists of a novel construction of casing sections having housing cavities of a novel contour for the reception of a novel construction of single bladed metallic terminals, the cavities in the molded casing sections maintaining the metallic elements in such a position, that they will readily receive or engage the disconnectible flat or round pin terminals, by reason of the novel construction of the extremities of said metal terminals, which are deflected from the axis ofthe plug. The halves of my novel casing are so designed that they will serve to clam the inclosed metallic contacts on to the disconnectible pin terminals or in other words, a casing element functions as one half of the contact finger or gripping'member.-

y invention further consists of a novel construction of metallic terminal which the outer ends of the terminals being bent away from the axis of the plug. My novel terminal comprising a single bladed element of the novel contour referred to results in a great saving of material, and in the cost of production and assembling over the plurality of metallic fingers heretofore employed, which completely inclose or make contact onv both sides of the appliance terminal posts. I

To the above ends my invention consists of a novel connecter plug whose casing is 'made in sections and wherein single bladed metallic terminals are employed having their outer ends bent away from the axis of the plug, so that an efiicient electrical contact with either a flat or rounded appliance terminal post can be readily made,

said contact being made on only one side of said plug or round terminal appliance post, while the juxtaposed contiguous wall of a casing member serves as one half of the contact fingers or gripping member.

For the purpose of illustrating my invention I have shown in the accompanying drawings several forms thereof which are at present preferred by me, since the same have been found in practice to give satisfactory and reliable results, although it is to be understood that the various instrumentalities of which my invention consists can be variously arranged and organized and that my invention is not limited to the precise arrangement and organizatlon of these instrumentalities as herein shown and described.

Figure 1 represents a plan view of ahea-ter connecter plug embodying my invention.

I Figure 2 represents aplan view of the mterior of one section of the-plug.

Figure 3 represents a plan view of the opposite section of the plug, showing my novel metallic contacts in position.

Figure 4 represents a section on line Figure 3.-

Figure 5 represents an end view of Figure 1.

Fi re 6 represents a plan view of Figure 3, with the terminals. removed therefrom. Figure 7 n represents .on an enlarged scale a perspective view of the casing member seen in Figure 3, showing particularl sin le bladed metallic terminals emp oyed an the manner of making electrical contact therewith on either a flat or a round appliance terminal post, the contact being made ononly one side of the ends or resilient portions of said terminals.

Figures 8 and 9 represent perspective views of opposite sides of my novel single bladed metallic terminal employed, the same being shown in detached position.

Similar numerals of reference indicate corresponding 1 parts. Referring to the drawings:-

1 designates my novelconstruction of heater connecter plug, the same comprising a sectional casing composed of the members 2 and 3. The inner juxtaposed faces of the two casing sections are provided with h0us ing cavities for my novel single bladed metallic terminals, said housing cavities being in duplicate so that the casing sections can be readily and cheaply formed from a single mold. The section 2 is provided with an angular recess 4 seen at the upper left hand portion of Figures 3 and 6, said recess merging into the longitudinally extending cavity 5, which terminates in the wall 6, below which is the semicircular inlet 7, the entrance to which is bevelled as at 8, to facilitate the ingress of the round or flat members or pins 9 and 10 of the terminal appliance post 11. 12 designates my novel single bladed metallic terminal, the same comprising the body portion 13, having the offset terminal arm 14, and from said body are pressed at a right angle thereto the lugs 15, the screw 16 passing through said body.

and its head 17 being positioned between said lugs 15, as will be apparent from Figure 9, and the right hand portions of Figures 3 and 7. By the formation of the deflected lugs 15, there are formed on opposite sides of the body 13, a pair of arms 18 and a single arm 19, the offset arm 14 and the arm 19 being supported on the wall 20, within the recess 4:, (see Figures 3 and 6) while the pair of opposite arms 18 are supported on the opposite wall 21 of the recess 22.

The recesses 4 are of substantially the same depth as the thickness of the body portion 13 and the oifset terminal arm 14, which therefore fitssnugly therein and are thus maintained by the opposed walls of the recesses or cavities 4 against any movement in a plane perpendicular to the body portion 13 ,or the plane of the arms 18 and 19.

The resilient member 23 of the terminal 12 is connected to the body 13 thereof by the curved portion 24, from which extends the stralght portion 25, which terminates in the end 26 deflected at an obtuse angle to the portion'25, and through the humped portion at the junction of the members 25 and 26. .1 form the longitudinally extending channel or seat27l The foregoing description has been directed to the construction seen at the left of Figures 3. 6, 7 and to Figure 8, it

being apparent that when the terminal 12 is placed in the cavity 5, of the casing section 2 with the screw 16 uppermost as seen in Figure 8, the parts will appear as seen at the left of Figures 3 and 7.

The construction seen at the right of Figures 3, 6, and 7 will next be described, the right hand cavity of the casing section 2 being indicated as 28, and merging into the groove or curved walls 29 which merge into the side walls 30, terminating in the bevelled wall 31, said side walls 30 inclining towards the bevelled wall 31 as indicated at 32, and best seen in Figures 4 and 6. Above the cavity 28 is the hole 33, which receives the threaded portion of the screw 16, as will be understood from Figure 4, and when the terminal 12 with the screw head 17 uppermost as seen in Figure 9 is placed in the cavity 28 the parts will appear as seen at the right of Figures 3 and 7 and as seen in Figure 4. The opposite casing section 3 has its inner face constructed as seen in Figure 2, which it will be seen corresponds to the inner face construction seen in Figure 6 of the casing section .2, and in order that the same may be clearly understood I have shown the inner housing cavity construction of the section 3 in detail in Figure 2, and have designated the corresponding elements in Figures 2 and 6, by the same referencenumerals. Both halves of the casing sections are thus made from the same mold, whereby I eliminate having a right and left and both the casing sections 2 and 3 at their ends are provided with the similarly constructed aligning annular channels 34. which receive the end 35 of the flexible spring member 36 of the usual construction.

The casing sections after the terminals 12 are placed therein are held assembled by the s rews 37 or the like. which pass through the aligning holes 38. The converging channels 39 permit the wiring connections to be readily made.

It will be apparent from the foregoing that when a pair of the terminals 12 are positioned in their housing cavities on the section 2, as seen in Figures 3 and 7, and when the section 3 seen in Figure 2 is placed thereon, the parts will appear as seen in Figure 4. If the round type appliance terminals 9 are inserted in the plug as seen in Fig. 7, the round pins will readily pass the deflected ends 26 and will be received in the longitudinal grooves 27 which make contact with one side only of said round pins, the requisite clamping or gripping efi'ect being obtained from the juxtaposed opposite wall of the casing section, as will be seen from Fig. 4. and the lower right hand portion of Fig. 7. In other words a casing section serves as one half of the contact finger or gripping member. In like manner, it will be seen that if it is desired to make the electrical connection by the flat blades 10, the internal plug construction is such that upon reversal of the post 11 from the position seen in Figure 7, said blades or flat tvpe terminals when inserted in the plug will be tightly gripped between the bowed or humped portion of the resilient member 23 and the juxtaposed casing wall, my novel plug thus being equally applicable to both the round type appliance terminals or the flat type terminals.

When the flat type terminals 10 are inserted in the plug, it will be seen that the parallelwalls .10 serve to guide and facilitate the entrance or insertion thereof.

It will now be apparentv that I have devised a novel anduseful heater connector plug which embodies the features of advantage enumerated as desirable in the statement of the invention and the above description, and while I have, in the present instance, shown and described a preferred embodiment thereof which will give in prac tice satisfactory and reliable results, it is to be understood that the same is susceptible of modification in various particulars without departing from the spirit or scope of the invention or sacrificing any of its advantages.

Having thus described my invention, what I claim is: x

1. A connecter plug comprising a longitudinally divided two part housing having recesses in the contiguous inner surfaces thereof, and a contact mounted in said recesses; each of said contacts being operatively opposed only by and adapted to coact with an inner wall of the opposed part of the housing thereby to grip a terminal pin of an electrical appliance.

2. A connecter plug comprising a longitudinally divided insulating housing comprising two parts having pairs of aligned recesses in the contiguous inner surfaces thereof and a contact mounted in each of said pairs of aligned recesses; each of said contacts being operatively opposed only by and adapted to coact with an inner wall of the corresponding opposed recess thereby to gr1p a terminal pin of an electrical appliance.

3. A connecter plug comprising a longitudinally divided two part insulating housing having pairs of aligned recesses in the contiguous inner surfaces thereof and a contact mounted in each of said airs of recesses; each of said contacts being adapted to coact with the inner walls of the corresponding and opposed recesses to grip a terminal pin of an electrical appliance between said inner walls and said contacts.

4. The hereindescribed contact, comprising a single bladed metallic member, having a body portion, a screw passing therethrough, a terminal lever arm, oppositely located supporting arms on each side of said screw, and a resilient humped contact member extending longitudinally and oppositely to said terminal lever arm, and having a deflected outer end and a longitudinal recess in said humped portion.

5. In a device of the character stated, a single bladed contact having a body portion, an offset terminal lever arm, and a resilient humped contact member of greater length than said ofl'set lever arm and extending oppositely thereto, having a deflected end and a longitudinally extending seat in the humped portion of said resilient contact member.

6. In a device of the character stated, a single bladed contact having a body portion, an offset terminal. lever arm, and a resilient humped contact member of greater length than said ofi'set lever arm extending oppositely thereto, having a deflected end and a longitudinally extending seat in said humped portion, a screw extending through said body portion, arms projecting from said body portion on opposite sides of said screw, and lugs proiecting at an angle from said body portion in proximity to the head of said screw.

7. In a device of the character stated, a two part housing having pairs of aligned and parallel cavities therein, single bladed metallic spring contacts positioned in said cavities, each having a longitudinally bowed portion having a longitudinal groove therein, and a deflected outer end, a wall of a cavity being adapted to coact with the juxtaposed contact to grip the pin of an electrical appliance.

JOHN B. DOWNING. 

